Hoist.



i). la.` BowLANn.

HOIST.

(Application led July S0, 1960.)

(No Model.)

@IWW-Trini? l* I f/fff THE Nonms PErEn c6.. Puo'rauka. WASHINGTDN. g. C.

' provements in Hoists; and I do hereby declare that the following is afull, clear, and

UNITED STATES PATENT OFFICE.l

DAVID E. ROWLAND, OF CANTON, OHIO.

v I SPECIFIGATION forming part of Letters Patent No. 690,774, datedJanuary 7, 1902.

Application filed July 30, 1900.

T0 all whom, 1225 mayconcern.:y

Be it known 'that I, DAVID E. ROWLAND, a Y citizen of the United States,residing at Canton, in the county of Stark and State of Ohio, haveinvented certain new and useful Imexact description of the same,reference being had to the annexed drawings, makinga part of thisspecication, and to the gures of reference marked thereon, in which- 4Figure 1 is a perspective view showing the different partsproperly'assembled. Fig. 2 is a side elevation of the hoist-head,showing an edge view of the pulleys. Fig. 3 isa vertical section of thehoist-head and its different parts 'on a linelwith the pulleyaxle,except theaxle is not shown in section. Fig. 4 isa detached view of thersupporting-hook. Fig. 5 is a detached view of the hook-connecting heador flanged collar. Fig. 6 is a detached view of the hook-connecting-headsections. Fig. 7 is a detached view of the collar-shifting yoke andlever. Fig.V 8 is a detached view of the sliding collar and its pins.Figs. 9 and v10 are detached views of the larger hoist-pulleys. Figs.Al1 and 12 are detached views of the smaller hoist-pulleys.

The present invention has relation tol hoists; and it consists in thediderent parts and combination of parts hereinafter described, andparticularly pointed out in the claims.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawings. i

In the accompanying drawings, 1 represents the hoist block or head, theupper end of which is yoke-shaped and the lower end or portion providedwith the chain-guides 2,said chain-guides being located and arrangedsubstantially as shown in Fig. 1.

To the head or frame 1 is connected the pulley-shaft 3, and upon whichpulley-shaft are mounted the pulleys 4 and 5, said pulleys being locatedside by side, as illustrated in Figs. 1, 2, and 3. The pulley 4 issomewhat larger in diameter than the pulley 5, said pulleys being soformed for the purpose of imparting a differentiated movement to thedifferent members of the endless chain 6,

said endless chain being located and arranged serial 110.215.238. (Nomodela substantially as shown, and, as shown, the members are locatedover the pulleys 4 and 5 and two members thereof located under the opulley 7 ,which pulley is properly j ournaled to the elevating head orblock 8, said head or block being provided with the ordinaryconnecting-hook 9 or its equivalent.

It will be understood that by forming` the 6o pulleys 4 and 5 ofdifferent diameters and moving the elevating-chain over said pulleys inthe direction to elevate the hoist head or block 8 a slow upwardmovement will be imparted to the head 8, together with the loadconnected thereto, thereby providing a`means for easily elevating byhand heavy articles.

By my peculiar arrangement I am' enabled to lower the elevating-headafter it has been carried to the desired height without locking 7o theelevating-chain backward.

For the purpose of overcoming the slow manner of lowering theelevating-head 8, as above described, I employ the single pulleys '4 and5 and locate them side by side and 75 mount them upon the shaft 3, andfor the purpose of causing the pulleys4 and 5 to rotate in unison whenitis desired to have them so rotated the sliding pins 10 are provided,which sliding pins are located in the aper- 8o tures 11, being formedthrough the pulley 4, and the pins extended into the apertures 12, vformed in the pulley 5, when they registerl with the pins 10, or, inother words, said pins enter the apertures 12 at the time they regis- 85ter with the apertures l1, thereby rotatably connecting the pulleys 4and 5 together. When it is desired to have the pulleys 4 and 5 rotatedindependently upon the shaft 3, the` lever 13 is pulled downward atitsouter end 9o by meansv of the chain or cord 14, saidchain or cord beingextended downward to a point where it can be conveniently reached by thehand of an operator. As the outer end of the lever 13 is moved downwardthe bottom 95 or lower end of the yoke 15 will bemoved laterally andaway from the outerrface of the pulley 4 and carry with it the groovedcollar 16, to which grooved collar the pins l0 are securely attached,and as the grooved collar roo 16 is moved away from the pulley 4 it willcarry with it the pins 10, thereby disconnecting said pins from theapertures 12, at which Y time the pulleys 4 and 5 are free to rotateindependently of each other. It will be understood that the groovedcollar 16 rotates at all times with the pulley 4, inasmuch as the pins10 are never disconnected from the pulley 4.

For the purpose of providing for the sliding movement of the groovedcollar 16 the pulley 4 is provided with the-hub 17, which hub is formedof such a length that the grooved collar 16 can move back and forth orto and from the outer face of the pulley 4. For the purpose of reducingthe friction of the grooved collar 16 and at the same time carrying saidcollar the outer portion of the hub 17 is provided with the fins or ribs18, and upon which ribs or tins the collar rests or moves. It will beunderstood that the ribs or tins should be so formed that they willengage the inner periphery of the aperture formed in the sliding collar,thereby allowing a free movement back and forth upon the hub proper.

The pulley 4 is provided with a chamber 19, which chamber is for thepurpose of holding the antifriction-rollers 20, said antifriotionrollersbeing located and arranged substantially as shown in the drawings. Thepulley 5 is provided with the hub 21, and said pulley is also providedwith the chamber 22, which chamber is for the purpose of receiving theantifriction-rollers 23, said rollers being located and arrangedsubstantially as shown in the drawings.

The top or upper end of the hoist frame or head 1 is provided with therecess or chamber 23nl and into which chamber or recess are placed thecoupling-head members 24, which coupling-head members are each providedwith the semicircular groove 25, and when said members are placedtogether the grooves 25 will form a complete circle, which groovedcircle is for the purpose of receiving the ange 2G, formed upon thelower end of the head 27, as illustrated in Fig. 3. Y

To the head 27 is connected the suspending-hook 2S, said suspendinghookbeing headed at its bottom or lower end, thereby securely connecting thehead 27 to the hook 28, and by providing the groove 25 in each member ofthe coupling-head 24 said coupling-head will be connected to the head 27by means of the flange 26, thereby producing a swivel connection betweenthe hook 28 and the head or frame 1.

The coupling-head members 24 are each provided with thedownward-extending arm 29, to which arms is pivotally connected thelever 13, said lever being also pivoted to the head or frame l by meansof the rivet or bolt 30 or its equivalent at a point directly over thedownward-extending yoke 15.

It will be understood that by providing two pivotal points for the lever13 when said lever is moved downward at its outer end its inner end willmove upward, carrying with it the head 1, and in order to provide forthis movement of the head 1 the chamber 23"L is so formed that it willallow the head 1 to come and go or move in a limited sense up and downupon the members of the coupling-head 24, it being understood that thechamber 23 will at all times hold the members 24 in proper contact witheach other. The only object in making the coupling-head 24 in twoseparate pieces or halves is to provide a means for connecting saidmembers orhead with the head 27.

For the purpose of providing a brake for the pulley 5 the lever 13 isprovided with the shoe 31, which shoe is preferably formed integral withsaid lever and is so located that it will engage the periphery of saidpulley 5 at a time when the lever is moved downward at its outer end.The shoe 3l should be so adjusted that it will stop the downwardmovement of the lever 13 at a point or time when the pins 10 aredisconnected from the pulley 5, thereby allowing the pulley 5 to be heldagainst rotation and allow an independent rotation of the pulley 4.

For the purpose of insuring the engagement of the pins 10 with theapertures 12 the inner face of the pulley 5 is provided with theinclines 32, or, in other words, recesses having inclined seats areprovided, said recesses being illustrated in Fig. 1l. In the drawings Ihave illustrated two pins 10, said pins being arranged as shown; but itwill be understood that a single pin will bring about the same result asthe two pins-that is to say, by the longitudinal movement of a singlepin in the same manner that the two pins show the pulleys 4 and 5 can beconnected and disconnected rotatably one from the other.

It will be understood that by pivotally connecting the lever 13 to thecoupling-head 24 or to the integral arms thereof and also pivotallyconnecting said lever to the hoist block or frame 1 the weight of saidhead or frame, together with its different parts, except thecoupling-head 24, the flange-head 27, and the hook 28, is utilized,together with the chain and the elevating-head, to force the outer endof the lever 13 upward and at the same time forcing the collar 15 towardthe pulley 4, by which arrangement the pulleys 4 and 5 are rotatablyconnected together by the longitudinal movement of the pin or pins 10.

Having fully described my invention, what I claim as new, and desire tosecu re by Letters Patent, is-

1. In a hoist of the class described, a frame provided with a chamberatits upper portion, v

a coupling-head located in the chamber, a head journaled to thecoupling-head, a lever pivotally connected to the coupling-head and tothe frame, a downward-extending yoke, a sliding collar operativelyconnected to the yoke and provided with a pin, a hub carrying thesliding collar, pulleys mounted upon the shaft and provided withapertures to engage the pin of the sliding collar, an elevatingpulley-block and an endless chain, all arranged substantially as and forthe purpose specified.

2. In a hoist a frame, means for suspending the frame, a shaft carriedbythe frame, a

IOO

IIO

neeted to the frame and to the coupling-head and an elevating chain, andan elevatingblock, substantially as and for the pupose 15 specified.

In testimony that I cla-im the above I have hereunto subscribed my namein the presence of two witnesses. A

DAVID n. RoWLAND.

Witnesses:

J. A. JEFFERS, F.1W. BOND.

